Chapter 4

Signal-to-Noise Ratio

Information in this chapter:

ent Cyber Attacks: The Early Years

ent The Pendulum Swings Back: Hacktivism and DDoS

Introduction

Signal-to-noise ratio (often abbreviated as SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. The signal-to-noise ratio, the bandwidth, and the channel capacity of a communication channel are connected by the Shannon–Hartley theorem1. Signal-to-noise ratio is sometimes used informally to refer to the ratio of useful ...

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